Ring for spinning and twisting frames and traveller for the same



964 G. N. ZAKHA v 3,159,953

RING FOR SPINNING AND T T MES AND TRAVELLER FOR THE A Filed Nov. 26,1962 INVENTOR 6 l Zwmmeou ATTORNEY;

United States Patent 3,159,963 RING FQR SPINNING AND TWISTING FRAh ESAND TRAVELLER FGR THE SAME Grigory Nickolajevich Zakharov, SirotskyPereuloh 17,

Apt. 76, Moscow, U.S.S.R. Filed Nov. 26, 1962, Ser. No. 244,537 4Claims. (Cl. 57-119) The present invention relates to spinning andtwisting machines, and more particularly has reference to the structuraldetails of the rings and travellers for such machines.

As is well known, the rapid wear of rings and travellers in spinning andtwisting machines-is largely due to the high specific pressure of thetraveller on the ring which is conditioned by the very small contactingsurface between these components. In order to increase the contactingsurface, it has been proposed to provide rings with an internalhyperbolic working surface for assuring complete contact therewith ofthe rectilinear working section of the traveller during operation, and areduced specific pressure of the traveller on the ring. ,The abovearrangement tended to reduce wear and elevate the rotational speed ofthe spindle.

A salient object of this invention is to provide means for increasingthe contacting surfaces of the ring and traveller thereby reducing thespecific pressure of the traveller on the ring and obtaining a greaterstability in operation.

Another object of the invention is to facilitate the setting andremoving of the traveller with respect to the ring.

With the above and other objects in view, the present inventioncomprehends a tapered ring provided with an external conical rim forholding a traveller which is defined by a substantially U-shaped memberand when the traveller is placed over the ring, one of the legs thereofmakes contact with the hyperbolic working surface of the ring while theend of the other leg is inturned with such inturned portion preventingthe traveller from leaving the ring.

Further objects and advantages of the invention will become more readilyapparent-to one skilled in the art from the following detaileddescription and annexed drawing, in which drawing the sole figure is avertical sectional view of a ring and traveller according to the presentinvention.

Referring to the drawing, a ring and a traveller co-' operable therewithare indicated generally 1 and 2, respectively. The ring 1 has top andbottom ends 3 and 4 and the interior thereof is provided with ahyperbolic surface 5 which extends from the bottom end 4 to upper point6. The upper end 3 is defined by the arc of a circle 6-7.

Exteriorly, the ring 1 is formed with three tapered surfaces 5, 9 and 10and the surfaces 9 and'lll are perpendicular. The tapered surfaces 8 and9 constitute a rim for retaining the traveller 2 on the ring as willlater be more fully described. A flange 11 is located between areas,there are no points of contact between the traveller 2 and the ring 1.

The inturned portion 15 of the leg 13 contacts the tapered surface 9 ofthe ring only in those situations where, during starting or stopping ofthe machine, the

traveller is moved upwardly. The contact between the traveller and thering underuniform pressure along the leg 12 is realized by acorresponding choice of hyperboloid parameters,

It has been demonstrated by extensive tests of the present inventionduring the spinning and twisting of wool that by virtue of reducedspecific pressure of the traveller on the ring and stability ofoperation, the wear resififice of the rings has been increased five-foldas compared to rings provided with horizontal rims, and the life of thetraveller also augmented approximately seven to ten times.

The present ring and traveller also reduce yarn breakage by 15-20% andpermit the speed of spinning and twisting wool to be raised by 20-25%without ring lubrication. The travellers are capable of operatingwithout lubrication at a linear speed of 45-50 m./sec., whereas thecustomary C-shaped traveller would immediately burn modifications may bemade therein so long as such changes mark no material departure from thespirit and scope the tapered surface 10 and the bottom end 4 to allowthe ring 1 to be attached to a suitable support.

The traveller 2 is a substantially U-shaped component and includes legs12 and 13 joined along an arc of a circle as indicated at 14. The legs12 and 13 are arranged in parallelism with the free end of the 'leg 13being inturned to define portion 15 which lies perpendicular to the leg13. Also, it will be noted that the leg 12 is of greater length than theleg 13.

During operation, the leg 12 makes contact at uniform pressure along itslength, with the hyperbolic surface 5 of the ring down the generatrix ofthe hyperbolic straight line whereby the traveller 2 is inclined forwardin the of the appended claims.

What I claim is:

l. A ring for spinning and twisting machines comprising a body havingtop and bottom ends and an internal hyperbolic surface located betweensaid ends, said top end of said body being defined by an arc of a circlejoining said hyperbolic surface, an external rim for said top end ofsaid body, a traveller mounted on said ring body, said travellerincluding a pair of spaced substantially parallel legs, one of said legsuniformly contacting said hyperbolic surface along its generatrix andmeans on the other of said legs. coacting with said rim for retainingthe traveller on said ring body.

2. A ring for spinning and twist-ing machines comprising a body havingtop and bottom ends and an internal hyperbolic surface located betweensaid ends, said top end being defined by an arc of a circle joining saidhyper- ,bolic surface, an external rim for said top end of saidhyperbolic surface located between said ends, said top end being definedby an arc of a circle joining said hyperbolic surface, an external rimforv said top end of said body including an outwardly and downwardlyinclined surface. and an inwardly and downwardly inclined surface, atraveller of substantially U-shape mounted on said ring body, the legsof said traveller being parallel and of different lengths,'the leg ofgreater length uniformly contacting said hyperbolic surface along itsgeneratrix for increasing the area of contact between the traveller andthe hyperbolic surface, and the free end of the, leg of lesser lengthhaving an'inturned portion for cooperation with said inwardly anddownwardly inclined surface of said external rim for retaining thetraveller on said ring body.

position in the plane of radial section of the ring. In other 4. A ringfor spinning and twisting machines compris rorml contacting saidhyperbolic surface along its generatrix for increasing the area ofcontact between the traveller and the hyperbolic surface, andthe freeend of the leg of lesser length having an inturned portionarrangedperpendicular to the leg of lesser length for cooperation with saidsecond tapered surface of said ex- 5 ternal rirn for retaining thetraveller on said ring body.

References Cited in the file of this patent UNITED STATES PATENTS2,413,930 Smith Jan. 7, 1947 10 2,451,470 Herr Feb. 8, 1949 Burns et al.Apr. 22, 1958 pa e".

4. A RING FOR SPINNING AND TWISTING MACHINES COMPRISING A BODY HAVINGTOP AND BOTTOM ENDS AND AN INTERNAL HYPERBOLIC SURFACE LOCATED BETWEENSAID ENDS, SAID TOP END BEING DEFINED BY AN ARC OF A CIRCLE JOINING SAIDHYPERBOLIC SURFACE, AN EXTERNAL RIM FRO SAID TOP END OF SAID BODYINCLUDING A FIRST TAPERED SURFACE AND A SECOND TAPERED SURFACE ARRANGEDPERPENDICULAR TO SAID FIRST TAPERED SURFACE, A TRAVELLER OFSUBSTANTIALLY U-SHAPED MOUNTED ON SAID RING BODY, THE LEGS OF SAIDTRAVELLER BEING PARALLEL AND OF DIFFERENT LENGTHS, THE LEG OF GREATERLENGTH UNIFORMLY CONTACTING SAID HYPERBOLIC SURFACE ALONG ITS GENERATRIXFOR INCREASING THE AREA OF CONTACT BETWEEN THE TRAVELLER AND THEHYPERBOLIC SURFACE, AND THE FREE END OF THE LEG OF LESSER LENGTH HAVINGAN INTURNED PORTION ARRANGED PERPENDICULAR TO THE LEG OF LESSER LENGTHFOR COOPERATION WITH SAID SECOND TAPERED SURFACE OF SAID EXTERNAL RIMFOR RETAINING THE TRAVELLER ON SAID RING BODY.